Clamp and blade clamping method

Abstract

The invention discloses a clamp and a blade clamping method.The clamp comprises a base and a clamping assembly arranged on the base, the clamping assembly is used for clamping a blade and comprises clamping blocks arranged in pairs and a plurality of fastening bolts, the clamping blocks are connected to the base, and a clamping space used for containing the blade is formed between the clamping blocks arranged in pairs; the clamping block is provided with a plurality of threaded through holes penetrating through the clamping block in the direction of the clamping space, the multiple threaded through holes are formed in the clamping block at intervals, the fastening bolts and the threaded through holes are arranged in a one-to-one correspondence mode, each fastening bolt is meshed with the corresponding threaded through hole, and the threaded ends of the fastening bolts extend into the clamping space through the threaded through holes. The clamp can be suitable for complex blades with various curvatures, and due to the fact that each fastening bolt has a self-locking function after being screwed to a proper position, the clamping reliability of the blades is guaranteed, the blades are prevented from loosening in the polishing process, and the polishing efficiency and quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of blade processing, and in particular to a clamp and a blade clamping method. Background Art

[0002] As an emerging processing technology, airbag polishing is often used for polishing various surface types such as planes, spheres or free-form surfaces. The technical principle of airbag polishing is to use a hemispherical crown-shaped flexible airbag with a polyurethane polishing pad attached to the surface as a polishing tool. When inflated, the flexible airbag tool can fit the surface of the workpiece. The advantages of airbag polishing include good surface adaptability and process flexibility. During the processing, the airbag tool simultaneously rotates and revolves around the normal of the contact area, thereby effectively avoiding the phenomenon of zero material removal in the center of the contact area and achieving uniform surface processing quality. In addition, the flexibility of the processing process can be improved by controlling key process parameters such as the amount of pressure, dwell time, and tool speed.

[0003] For the fixation of irregular blades, the design of the fixture needs to fully consider the shape of the blade and the stability requirements during the polishing process. However, when faced with the problem of efficient and high-quality processing of multi-curvature blade surfaces, the existing fixtures cannot be used to clamp different multi-curvature blades or the fixation effect of multi-curvature blades is poor. The blades may loosen during the polishing process, reducing the polishing efficiency and quality. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects in the prior art and provide a clamp and a blade clamping method.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A clamp, the clamp comprising a base and a clamping assembly arranged on the base, the clamping assembly being used to clamp a blade, the clamping assembly comprising clamping blocks arranged in pairs and a plurality of fastening bolts, the clamping blocks being connected to the base, a clamping space for accommodating the blade being formed between the clamping blocks arranged in pairs, the clamping blocks being provided with a plurality of threaded through holes penetrating the clamping blocks in the direction of the clamping space, the plurality of threaded through holes being arranged at intervals on the clamping blocks, the fastening bolts being arranged in one-to-one correspondence with the threaded through holes, each fastening bolt being respectively engaged with the corresponding threaded through hole, and the threaded ends of the fastening bolts extending into the clamping space through the threaded through holes.

[0007] In the present technical solution, a clamping block is provided, and a plurality of fastening bolts are provided on the clamping block, and the threaded ends of the fastening bolts extend into the clamping space through the threaded through holes. When the clamp is used to clamp the blade, since each fastening bolt can be adjusted independently and multiple fastening bolts make multi-point contact with the blade, the clamp can be suitable for complex blades with a variety of curvatures. Furthermore, since each fastening bolt has a self-locking function after being screwed into the appropriate position, the reliability of the clamping of the blade is ensured, the blade is prevented from loosening during the polishing process, and the efficiency and quality of the polishing are improved.

[0008] Preferably, the threaded through holes are evenly arranged on the clamping block.

[0009] In the present technical solution, by evenly arranging the threaded through holes on the clamping block, the distribution of the force points when the blade is clamped is more even, avoiding local or uneven force on the blade, and achieving a better clamping effect on the blade.

[0010] Preferably, the clamp also includes a control module and a servo motor, the clamping assembly is connected to the base via the servo motor, the control module is signal-connected to the servo motor, and is used to control the servo motor to drive the clamping assembly to rotate to adjust the posture of the clamping assembly.

[0011] In this technical solution, by setting an acoustic control module and a servo motor in the fixture, the clamping posture of the fixture can be adjusted, which can provide a flexible polishing posture for the airbag polishing tool, reduce the airbag tool path planning cost, and effectively improve the processing efficiency.

[0012] Preferably, there are two servo motors, and output shafts of the two servo motors are perpendicular to each other.

[0013] In the present technical solution, two servo motors are provided, and the output shafts of the two servo motors are perpendicular to each other, so that the servo motors can adjust the clamping assembly with multiple degrees of freedom.

[0014] Preferably, the clamp also includes an acoustic emission device, a detection end of which is arranged toward the clamping space and is used to detect the shape of a blade located in the clamping space, the acoustic emission device is signal-connected to the control module, and the control module controls the servo motor to drive the clamping assembly to rotate based on the blade shape detected by the acoustic emission device.

[0015] In this technical solution, the device for detecting the blade shape is an acoustic emission device. Compared with using a visual sensor, the acoustic emission device has a faster response speed and higher measurement accuracy, that is, it can detect the blade shape more quickly and accurately and feed back the detection signal to the control module, which can further improve the efficiency and quality of polishing.

[0016] Preferably, the sound emitting device is arranged on a surface of one of the clamping blocks located in the clamping space.

[0017] In this technical solution, by placing the acoustic emission device on the clamping block, the distance between the acoustic emission device and the blade is closer, and the acoustic emission device can more accurately measure the blade shape. In particular, for long parts such as blades, placing the acoustic emission device on the clamping block can be closer to the blade without being limited by the length of the blade.

[0018] Preferably, the base includes a bottom plate, two vertical rods, a fixed plate and a fixed axis, the two vertical rods are fixed at intervals on the upper surface of the bottom plate, the two vertical rods are perpendicular to the bottom plate, the fixed plate is arranged between the two vertical rods, the fixed axis is formed on both sides of the fixed plate and is rotatably connected to the vertical rods, and the clamping assembly is detachably connected to the fixed plate.

[0019] Preferably, the number of the clamping blocks is multiple pairs.

[0020] In the technical solution, by providing a plurality of pairs of clamping blocks, the clamping effect of the clamp on blades with multiple curvatures is improved.

[0021] Preferably, the clamping block comprises a connecting portion and a clamping portion, the connecting portion and the clamping portion are perpendicular to each other so that the clamping block forms an L-shape, the clamping portions of the paired clamping blocks are parallel to each other, and the connecting portions of the paired clamping blocks are connected.

[0022] In the technical solution, the connection between each pair of clamping blocks is facilitated by arranging the clamping blocks to be L-shaped.

[0023] A blade clamping method, wherein the blade is clamped by a clamp as described in any one of claims 1 to 9;

[0024] The clamping method comprises the following steps:

[0025] S1: placing the blade on the base of the fixture;

[0026] S2: installing the clamping assembly of the clamp onto the base and positioning the blade in the clamping space of the clamping assembly;

[0027] S3: Use a torque wrench to tighten the fastening bolts of the clamp so that the tail of the fastening bolts fixes the blade.

[0028] In the present technical solution, the blade is clamped by using the clamp as described above, so that the blade is clamped more reliably and the blade is prevented from loosening during the polishing process. At the same time, a torque wrench is used to tighten the bolts to avoid excessive pressure or damage to the blade due to insufficient tightening or over-tightening.

[0029] The positive and progressive effect of the present invention is that by setting a clamping block and arranging multiple fastening bolts on the clamping block, the threaded ends of the fastening bolts extend into the clamping space through the threaded through holes. When the clamp is used to clamp the blade, since each fastening bolt can be adjusted independently and multiple fastening bolts and the blade make multi-point contact, the clamp can be suitable for complex blades with various curvatures. Furthermore, since each fastening bolt has a self-locking function after being screwed into the appropriate position, the reliability of clamping the blade is guaranteed, the blade is prevented from loosening during the polishing process, and the efficiency and quality of polishing are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of the clamp according to Example 1 of the present invention (I).

[0031] Figure 2 Schematic diagram of the three-dimensional structure of the clamp according to embodiment 1 of the present invention (II).

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of the clamp of Example 1 of the present invention (III).

[0033] Description of reference numerals:

[0034] Fixture 100

[0035] Clamping assembly 1

[0036] Clamping block 11

[0037] Threaded through hole 101

[0038] Fastening bolt 12

[0039] Bottom plate 21

[0040] Raised portion 201

[0041] Vertical bar 22

[0042] Fixed plate 23

[0043] Servo motor 3

[0044] Acoustic emission equipment 4 DETAILED DESCRIPTION

[0045] Example 1

[0046] like Figure 1-Figure 3As shown, this embodiment provides a clamp 100, which includes a base and a clamping assembly 1 arranged on the base. The clamping assembly 1 is used to clamp the blade, and the clamping assembly 1 includes a pair of clamping blocks 11 and a plurality of fastening bolts 12. The clamping blocks 11 are connected to the base, and a clamping space for accommodating the blade is formed between the pair of clamping blocks 11. Each clamping block 11 has a plurality of threaded through holes 101 penetrating the clamping block 11 in the direction of the clamping space. The plurality of threaded through holes 101 are arranged at intervals on the clamping block 11. The fastening bolts 12 are arranged one by one corresponding to the threaded through holes 101. Each fastening bolt 12 is respectively engaged with the corresponding threaded through hole 101, and the threaded ends of the fastening bolts 12 extend into the clamping space through the threaded through holes 101. By setting a clamping block 11 and setting a plurality of fastening bolts 12 on the clamping block 11, the threaded ends of the fastening bolts 12 extend into the clamping space through the threaded through hole 101. When the clamp 100 is used to clamp the blade, since each fastening bolt 12 can be adjusted independently and multiple fastening bolts 12 make multi-point contact with the blade, the clamp 100 can be applied to complex blades with various curvatures. Furthermore, since each fastening bolt 12 has a self-locking function after being screwed to a suitable position, the reliability of the clamping of the blade is guaranteed, the blade is prevented from loosening during the polishing process, and the efficiency and quality of the polishing are improved. In addition, different fastening bolts 12 can be screwed as needed to lock in different positions, so that the position and angle of the blade in the clamping space can be adjusted, rather than being fixed in the middle of the clamping space.

[0047] In this embodiment, the threaded through holes 101 are evenly arranged on the clamping block 11, specifically arranged in an array, so that the distribution of the force points when the blade is clamped is relatively uniform, avoiding local force or uneven force on the blade, so that the clamping effect of the blade is better. Of course, in other embodiments, multiple threaded through holes 101 can also be set on the clamping block 11 according to other arrangement schemes, so as to achieve multi-point fixation by contacting the surface of the blade with multiple fastening bolts 12.

[0048] Among them, since the fastening bolt 12 can be removed from the threaded through hole 101, Figure 1-Figure 3 The fastening bolts 12 are not shown at the part of the threaded through holes 101 shown in the figure. That is to say, during use, the number of the fastening bolts 12 can be selected according to actual needs, and will not be repeated here.

[0049] Meanwhile, in this embodiment, the clamping block 11 can be made of a material with certain flexibility and adaptability in the prior art so as to better fit the shape of the blade.

[0050] In this embodiment, the clamp 100 for tightening the bolt 12 further includes a control module (not shown in the figure) and a servo motor 3. The clamping assembly 1 is connected to the base via the servo motor 3. The control module is connected to the servo motor 3 by signal and is used to control the servo motor 3 to drive the clamping assembly 1 to rotate so as to adjust the posture of the clamping assembly 1. By arranging the acoustic control module and the servo motor 3 in the clamp 100, the clamping posture of the clamp 100 can be adjusted, and a flexible polishing posture can be provided for the airbag polishing tool, thereby reducing the cost of airbag tool path planning and effectively improving processing efficiency.

[0051] Among them, in this embodiment, if Figure 1-Figure 3 As shown, the fixture 100 also includes an acoustic emission device 4, the detection end of the acoustic emission device 4 is arranged toward the clamping space, and is used to detect the blade shape in the clamping space. The acoustic emission device 4 is connected to the control module by signal to send the measured blade shape data to the control module, so that the control module can control the servo motor 3 to drive the clamping assembly 1 to rotate based on the blade shape detected by the acoustic emission device 4. In this embodiment, the acoustic emission device 4 is used as a device for detecting the blade shape. Compared with using other sensors to detect the blade shape (such as visual sensors, etc.), the acoustic emission device 4 has a faster response speed and higher measurement accuracy, that is, it can detect the blade shape more quickly and accurately and feed back the detection signal to the control module, which can further improve the efficiency and quality of polishing.

[0052] Specifically, the acoustic emission device 4 is arranged on the fixture 100 so as to be relatively closer to the clamped blade than being arranged at other positions. In the present embodiment, the specific position is that the clamping block 11 arranged at the lower side is located on the surface of the clamping space. By arranging the acoustic emission device 4 on one of the clamping blocks 11, the distance between the acoustic emission device 4 and the blade is closer, and the acoustic emission device 4 can more accurately measure the blade shape.

[0053] Of course, in other embodiments, other sensors may be used to detect the shape of the blade, such as a visual sensor. However, in order to detect the full view of the blade, the visual sensor needs to be set at a farther position, which will increase the volume of the fixture 100. At the same time, the response speed and accuracy of the visual sensor are poor. Therefore, it is relatively better to use the acoustic emission device 4 as a sensor for detecting the blade.

[0054] Among them, the acoustic emission device 4, the servo motor 3 and the control module are connected by signals. After the acoustic emission device 4 detects the blade shape, it transmits the signal to the control module, so that the control module can control the servo motor 3 to adjust the clamping posture of the clamp 100 based on the measured blade shape. Among them, the control principle and specific implementation method of the control module are both existing technologies and will not be repeated here.

[0055] In this embodiment, there are two servo motors 3, and the output shafts of the two servo motors 3 are perpendicular to each other so as to adjust the posture of the clamping assembly 1 along different rotation axes. Specifically, the base includes a bottom plate 21, two vertical rods 22, a fixed plate 23 and a fixed shaft (not shown in the figure), the two vertical rods 22 are fixed on the upper surface of the bottom plate 21 at intervals, the two vertical rods 22 are perpendicular to the bottom plate 21, the fixed plate 23 is arranged between the two vertical rods 22, the fixed shaft is formed on both sides of the fixed plate 23 and is rotatably connected to the vertical rods 22, and the clamping assembly 1 is detachably connected to the fixed plate 23; the extension direction of the output shaft of one of the servo motors 3 is the same as the extension direction of the rotating shaft of the fixed plate 23 and is connected to the fixed shaft, and the output shaft of the other servo motor 3 is perpendicular to the fixed plate 23 and is connected to the fixed plate 23. By setting two servo motors 3, and the output shafts of the two servo motors 3 are perpendicular to each other, the servo motors 3 can adjust the clamping assembly 1 with multiple degrees of freedom.

[0056] like Figure 1-Figure 3 As shown, the clamping assembly 1 can rotate around two mutually perpendicular rotation axes. Figure 1 is a schematic diagram of the structure when the clamping assembly 1 is not rotating, Figure 2 is a schematic diagram of the structure when the clamping assembly 1 rotates around a fixed axis, Figure 3 The schematic diagram is a structural diagram of the clamping assembly 1 rotating around a rotation axis perpendicular to the fixed plate 23. At this time, the fixed plate 23 and the clamping assembly 1 rotate synchronously. The two servo motors 3 work separately to achieve the purpose of adjusting the posture of the clamping assembly 1, meeting the posture adjustment requirements of the flexible airbag polishing.

[0057] Of course, in other embodiments, the number of servo motors 3 may be one or more to adjust the posture of the clamping assembly 1 along one or more rotation axes. The specific number may be based on actual design requirements and will not be repeated here.

[0058] In this embodiment, the fixing seat further includes a protrusion 201, which is formed on the upper surface of the bottom plate 21, and the servo motor 3 is arranged on the protrusion 201. In this embodiment, the clamping assembly 1 is erected above the bottom plate 21 through the trunk on the base and the fixing plate 23, and the fixing plate 23 can be arranged at a higher position in the vertical direction, so that it is more convenient to tighten the bolt 12 with the knob, and the servo motor 3 is arranged by setting the protrusion 201, so that the servo motor 3 can be raised to match the assembly of the clamping assembly 1.

[0059] In this embodiment, only one pair of clamping assemblies 1 is provided in the clamping assembly 1. In other embodiments, the number of clamping blocks 11 can also be set to multiple pairs to clamp the blades together. By providing multiple pairs of clamping blocks 11, the clamp 100 has a better clamping effect on blades with multiple curvatures, which will not be described in detail here.

[0060] Specifically in this embodiment, the clamping block 11 includes a connecting portion and a clamping portion, the connecting portion and the clamping portion are perpendicular to each other so that the clamping block 11 is formed into an L shape, the clamping portions of the pair of clamping blocks 11 are parallel to each other, and the connecting portions of the pair of clamping blocks 11 are attached to and connected to each other. By setting the clamping block 11 to be L-shaped, the connection between each pair of clamping blocks 11 is facilitated.

[0061] Of course, in other embodiments, the clamping blocks 11 may be separated and fixed by other structures, or when the thickness of the clamped blades does not vary much, the paired clamping blocks 11 may be an integrally formed structure, etc., which will not be elaborated here.

[0062] Example 2

[0063] This embodiment provides a method for clamping a blade, and the clamping method clamps the blade by the clamp in Embodiment 1. The clamping method comprises the following steps: S1: placing the blade on the base of the clamp; S2: installing the clamping assembly of the clamp on the base and positioning the blade in the clamping space of the clamping assembly; S3: using a torque wrench to tighten the clamping bolt so that the tail of the tightening bolt fixes the blade. By using the clamp as above to clamp the blade, the clamping of the blade is more reliable, and the blade is prevented from loosening during the polishing process. At the same time, by using a torque wrench to tighten the tightening bolt, it is avoided that the blade is not tightened properly or over-tightened to cause excessive pressure or damage to the blade, thereby ensuring the stability of the blade during the polishing process.

[0064] The fixture may also be provided with grooves and bosses for preliminarily fixing the blades, so as to facilitate the preliminarily fixing of the blades in step S1 and make it more convenient to screw the fastening bolts.

[0065] In step S2, since the clamping assembly is detachable, when the clamping assembly of the clamp is installed on the base, the clamping assembly can be removed first, and after the blade is placed, the clamping assembly can be installed on the base, and the clamping block and the blade are tightly fitted. For the part of the blade that cannot fit with the clamping block, the clamping is performed by tightening the fastening bolts.

[0066] After step S3, that is, after the blade is fixed, the fixation of the fixture should also be checked to ensure that the blade does not move or shake during the polishing process. If necessary, the tightening degree of the fastening bolts can be adjusted to ensure the best fixing effect.

[0067] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A clamp, comprising a base and a clamping assembly arranged on the base, the clamping assembly is used to clamp a blade, characterized in that ； The clamping assembly includes clamping blocks arranged in pairs and a plurality of fastening bolts, the clamping blocks are connected to the base, and a clamping space for accommodating the blades is formed between the clamping blocks arranged in pairs, the clamping blocks are provided with a plurality of threaded through holes penetrating the clamping blocks in the direction of the clamping space, a plurality of threaded through holes are arranged at intervals on the clamping blocks, the fastening bolts are arranged in one-to-one correspondence with the threaded through holes, each fastening bolt is respectively engaged with the corresponding threaded through hole, and the threaded ends of the fastening bolts extend into the clamping space through the threaded through holes.

2. The clamp according to claim 1, characterized in that The threaded through holes are evenly arranged on the clamping block.

3. The clamp according to claim 1, characterized in that The clamp also includes a control module and a servo motor. The clamping assembly is connected to the base via the servo motor. The control module is signal-connected to the servo motor and is used to control the servo motor to drive the clamping assembly to rotate so as to adjust the posture of the clamping assembly.

4. The clamp according to claim 3, characterized in that There are two servo motors, and the output shafts of the two servo motors are perpendicular to each other.

5. The clamp according to claim 3, characterized in that: The clamp also includes an acoustic emission device, a detection end of which is arranged toward the clamping space and is used to detect the shape of a blade located in the clamping space. The acoustic emission device is connected to the control module by signal, and the control module controls the servo motor to drive the clamping assembly to rotate based on the blade shape detected by the acoustic emission device.

6. The clamp according to claim 5, characterized in that The sound emitting device is disposed on a surface of one of the clamping blocks located in the clamping space.

7. The clamp according to claim 1, characterized in that The base includes a bottom plate, two vertical rods, a fixed plate and a fixed axis. The two vertical rods are fixed at intervals on the upper surface of the bottom plate. The two vertical rods are perpendicular to the bottom plate. The fixed plate is arranged between the two vertical rods. The fixed axis is formed on both sides of the fixed plate and is rotatably connected to the vertical rods. The clamping assembly is detachably connected to the fixed plate.

8. The clamp according to any one of claims 1 to 7, characterized in that: The number of the clamping blocks is multiple pairs.

9. The clamp according to any one of claims 1 to 7, characterized in that: The clamping block comprises a connecting portion and a clamping portion, the connecting portion and the clamping portion are perpendicular to each other so that the clamping block is formed into an L shape, the clamping portions of the paired clamping blocks are parallel to each other, and the connecting portions of the paired clamping blocks are connected.

10. A blade clamping method, characterized in that: The clamping method clamps the blade by a clamp as described in any one of claims 1 to 9; The clamping method comprises the following steps: S1: placing the blade on the base of the fixture; S2: installing the clamping assembly of the clamp onto the base and positioning the blade in the clamping space of the clamping assembly; S3: Use a torque wrench to tighten the fastening bolts of the clamp so that the tail of the fastening bolts fixes the blade.

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